MUSCLES OF THE NECK. 377 



The Stylo-Hyoideus, 



Is the more superficial of the three styloid muscles. It arises 

 tendinous from the middle and inferior part of the styloid pro- 

 cess of the temporal bone; and being perforated, as mentioned, 

 by the tendon of the digastricus, is inserted tendinous into the 

 cartilaginous juncture of the base and cornu of the os hyoides. 



It draws the os hyoides upwards and backwards.* 



The Stylo- Glossus, 



Is within and above the other; it arises from the upper in- 

 ternal part of the styloid process, tendinous and fleshy, and is 

 inserted into the side of the root of the tongue, forming a part 

 of its structure.! 



It draws the tongue backwards.J 



The Stylo- Pharyngeus, 



Is more deeply situated than either of the other two muscles. 

 It arises from the inner side of the styloid process near its root, 

 and runs into the side of the pharynx between the middle and 

 upper constrictors, opposite the tonsil gland; it afterwards de- 

 scends between the lining membrane of the pharynx and the 

 middle and lower constrictors, and is inserted into the posterior 

 margin of the thyroid cartilage. 



It draws the larynx and pharynx upwards. 



The Mylo-Hyoideus, 



Forms the floor of the mouth and suspends the tongue; it 

 arises at the root of the alveolar processes of the lower jaw, 

 from a ridge extending from the last dens molaris to the chin. 

 Its fibres converge towards a white tendinous line placed be- 



.* Varieties. This muscle is frequently double. 

 t See Tongue. 



t Varieties. J. F. Meckel says, that on one occasion he found it double on 

 both sides. 



32* 



